how to set attributes on a polyline

MichaelEber — Mon, 10 Feb 2014 18:59:22 GMT

here is what I am trying to achieve:
We have a polygon area that will delay a ship moving through that area for a period of time. I need to apply this to our hydrography map.

How we are doing this:
Each cell in the cost array equal (n sec/meter) * 1000 depending on the speed of the ship
The delay needs to be applied with the value 1 in the middle cells and the delay time / 2 in the outer rim of the polygon.

We use IExtractionOp2.Polygon to get the part of the hydrography raster that the polygon overlays
We set the entire polygon area to the value 1 using ReclassByRemap
Next I get the polygon.Boundary to get the polyline that encompasses the outer ring of the polygon.
Finally I intended to call PolygonToRaster to get a raster with the outer rim set to delay time /2

The call to PolylineToRaster fails and I think the reason is I'm passing an integer field. The documetation, I found, states it has to be "any attribute field in the Polygon". So how do I set a specific attirbute field with the values I need? The polyline doesn't even expose anything like AddAttribute!!!

Thanks

Re: how to set attributes on a polyline

DuncanHornby — Wed, 19 Feb 2014 14:23:21 GMT

Mike,

It is not clear which tools you are trying to run.

You state "Next I get the polygon.Boundary to get the polyline that encompasses the outer ring of the polygon." but IPolygon has no method Boundary?

You refer to "PolylineToRaster" can I assume this is the geo-processing tool and not some function you are attempting to build? If it is then this tool takes as input a FeatureLayer not a single geometry object so a number for a field makes no sense. To use this tool you would need to store your polyline in a FeatureClass and supply the FeatureClass to the tool.

Duncan

topic Re: how to set attributes on a polyline in ArcObjects SDK Questions

how to set attributes on a polyline

Re: how to set attributes on a polyline